49 lines
1.3 KiB
Bash
49 lines
1.3 KiB
Bash
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#!/bin/sh
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export PATH=/usr/bin:/usr/sbin
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export SYSTEMD_IN_INITRD=lenient
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[ -e /proc/mounts ] ||
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(mkdir -p /proc && mount -t proc -o nosuid,noexec,nodev proc /proc)
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grep -q '^sysfs /sys sysfs' /proc/mounts ||
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(mkdir -p /sys && mount -t sysfs -o nosuid,noexec,nodev sysfs /sys)
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grep -q '^none / ' /proc/mounts || grep -q '^rootfs / ' /proc/mounts && ROOTFS_IS_RAMFS=1
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if [ -f /proc/device-tree/rtas/ibm,kernel-dump ] || [ -f /proc/device-tree/ibm,opal/dump/mpipl-boot ]; then
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mkdir /newroot
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mount -t ramfs ramfs /newroot
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if [ $ROOTFS_IS_RAMFS ]; then
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for FILE in $(ls -A /fadumproot/); do
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mv /fadumproot/$FILE /newroot/
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done
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exec switch_root /newroot /init
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else
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mkdir /newroot/sys /newroot/proc /newroot/dev /newroot/run /newroot/oldroot
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grep -q '^devtmpfs /dev devtmpfs' /proc/mounts && mount --move /dev /newroot/dev
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grep -q '^tmpfs /run tmpfs' /proc/mounts && mount --move /run /newroot/run
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mount --move /sys /newroot/sys
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mount --move /proc /newroot/proc
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cp --reflink=auto --sparse=auto --preserve=mode,timestamps,links -dfr /fadumproot/. /newroot/
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cd /newroot && pivot_root . oldroot
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loop=1
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while [ $loop ]; do
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unset loop
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while read -r _ mp _; do
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case $mp in
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/oldroot/*) umount -d "$mp" && loop=1 ;;
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esac
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done </proc/mounts
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done
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umount -d -l oldroot
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exec /init
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fi
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else
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exec /init.dracut
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fi
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